Answer:
The lab technician must screen 5 slides per hour
Explanation:
If the lab technician works 5 days a week, and 7 hours per day, then she works 5*7 = 35 hours a week.
Given she must screen 175 slides each week, we can calculate on average, the number of slides per hour needed to complete the work.
The average is calculated as:


The lab technician must screen 5 slides per hour